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Thread: What The Difference Between the JDM-A20A and the USDM A20A?

  1. #1
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    What The Difference Between the JDM-A20A and the USDM A20A?

    A buddy of mine is like

    "yo JDM guy JDM" because he claims he has a JDM A20A in his garage. WELL!

    I went to see it and it looks the same as my USDM A20A engine.

    How can I tell just by looking at it if it is indeed a JDM A20.

    ALSO...are there any internal differences known between the JDM and USDM engines?

    Tnkx for any info!



  2. #2

    NXRacer's Avatar
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    thats a good question. everytime i try to get a 'jdm' a20a they try to pawn an a18 off on me.
    Nothin' 2 Old Racing

  3. #3

    carotman's Avatar
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    They are the same

    The vacuum lines should be different... that's all.

    http://pages.videotron.com/omus
    3geez member since July 12 2000

    I need these parts!
    https://www.3geez.com/forum/showthread.php?t=67742

  4. #4
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    Originally posted by NXRacer
    thats a good question. everytime i try to get a 'jdm' a20a they try to pawn an a18 off on me.
    That happened to me...I drove to MTL to check out a "JDM-A20A"...turns out it was a stupid dual carb engine!

    No disrespect to the dual carb peeps....side drafts are cool and old-skool and deserve respect for being carbs..

    But disrespect to the guy that does not know the diff between a MPFI engine and a carbed engine!

  5. #5
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    Originally posted by carotman
    They are the same

    The vacuum lines should be different... that's all.
    OK cool....

    What about casting quality? Port size? Piston bore/stroke? Cam lift and duration?

    All the same as the USDM?

    What about throttle body bore size?

    Does anyone know?

    Gear ratios to the JDM tranni?

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